Bloodsworn Steward [Vampire]: Useful since this deck has a low-casting commander
He comes down sooner, and can even trigger the combo by giving your creatures lifelink
Swapping in the Spirit Dragon Teval, the Balanced Scale gives you a neat ramp package when attacking, letting you mill three cards and then get a land from your graveyard back to play
Ikoria's Apex cycle featured five creatures (Brokkos, Illuna, Nethroi, Snapdax, and Vadrok) who each had Mutate and occupied their own three-colour colour identities, while Guildpact's Nephilim cycle had five Nephilim creatures who each had four of the five colours, each missing a different one
They are an archer, after all, and highly relevant, as the damage that Tor Wauki deals also keeps you alive
The alternative was to burn five sideboard slots on useless cards, and that obviously was not a good answer